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1.发明授权Frequency stabilization method of semiconductor laser, frequency-stabilized light source and laser module 失效半导体激光器，频率稳定光源和激光模块的频率稳定方法
公开(公告)号：US5392303A
公开(公告)日：1995-02-21
申请号：US220223
申请日：1994-03-30
IPC分类号： H01S5/024 , H01S5/068 , H01S5/0687 , H01S3/13
CPC分类号： H01S5/06808 , H01S5/024 , H01S5/02415 , H01S5/06804 , H01S5/0687
摘要： A frequency stabilization method of a semiconductor laser is provided. A driving current, a forward voltage and an output light power of the laser mounted on a heat sink is detected. A temperature of the heat sink is also detected. A consumption power of the laser is obtained from the driving current and voltage thus detected, providing a relationship between the output light power and the consumption power. The driving current is controlled so that the output light power is kept constant, and the temperature of the heat sink is controlled based on the relationship so that a temperature of an active layer of the laser is maintained. The output light power is kept constant and at the same time, any temperature change of the active layer is cancelled through the temperature control of the heat sink. Even if the consumption power changes due to an leakage current and/or a recombination current without luminescence to maintain the output light power during long time operation, the temperature of the active layer is maintained by cancelling the consumption power change through the temperature control of the heat sink. Thus, the oscillation frequency of the semiconductor laser can be stabilized at a given value.
摘要翻译： 提供半导体激光器的频率稳定方法。 检测安装在散热器上的激光器的驱动电流，正向电压和输出光功率。 还检测散热器的温度。 从所检测的驱动电流和电压获得激光的消耗功率，提供输出光功率与消耗功率之间的关系。 控制驱动电流，使得输出光功率保持恒定，并且基于保持激光器的有源层的温度的关系来控制散热器的温度。 输出光功率保持恒定，同时通过散热器的温度控制来消除有源层的任何温度变化。 即使消耗功率由于泄漏电流而变化，和/或没有发光的复合电流在长时间运行期间保持输出光功率，有源层的温度通过消除功率变化来维持 散热器。 因此，半导体激光器的振荡频率可以稳定在给定值。
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公开(公告)号：US5471332A
公开(公告)日：1995-11-28
申请号：US228896
申请日：1994-04-18
IPC分类号： H04B10/032 , H04L1/22 , H04J14/00
CPC分类号： H04B10/032 , H04L1/22
摘要： An apparatus and a method for performing hitless switching between optical transmission lines such as optical fiber circuits are provided. An optical switch or optical switching network having input terminals and output terminals for selecting optical signals inputted to the input terminals to the output terminals with a selection ratio which can be varied continuously is used. An optical signal converter for generating an optical signal of light which does not interfere with another optical signal is attached to the optical switch. Further, a signal loop interconnecting one of the output terminals of the switch and the input of the optical signal converter is provided. When hitless switching between two optical transmission lines is performed, the same information signal is first inputted to the two transmission lines on the transmission side, then the optical signal from the two lines are transmitted to one of the output terminal (aimed output terminal) of the switch and another output terminal connected to the signal loop. The phase difference between the optical signals is detected and adjusted, and the optical switch is controlled so that the optical signal to be selected at the aimed output terminal is varied to the signal passing through the signal loop.
摘要翻译： 提供了一种用于在诸如光纤电路的光传输线之间进行无中断切换的装置和方法。 使用具有输入端子和输出端子的光开关或光开关网络，用于选择以可连续变化的选择比率输入到输出端子的输入端子的光信号。 用于产生不干扰另一光信号的光的光信号的光信号转换器附接到光开关。 此外，提供了将开关的输出端子之一和光信号转换器的输入互连的信号回路。 当进行两条光传输线路之间的无连接切换时，首先将相同的信息信号输入到发送侧的两条传输线路，然后将来自两条线路的光信号发送到输出端 开关和另一个输出端连接到信号回路。 检测并调整光信号之间的相位差，并且控制光开关，使得在目标输出端选择的光信号变为通过信号环路的信号。
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公开(公告)号：US5357097A
公开(公告)日：1994-10-18
申请号：US981319
申请日：1992-11-25
申请人： Takahiro Shiozawa , Naoki Shimosaka
发明人： Takahiro Shiozawa , Naoki Shimosaka
CPC分类号： G02F1/113 , G02F1/125 , G02F2203/055
摘要： An apparatus for controlling an acousto-optic filter includes a high-frequency oscillator, a beam intensity detector, a first and a second oscillator, and a first and a second controller. The high-frequency oscillator drives the acousto-optic filter and the frequency of the driving signal is finely modulated by oscillation frequency f.sub.0 of the first oscillator. The detector detects an output signal beam intensity of the acousto-optic filter. An output of the detector is synchronously detected at the frequency f.sub.0 and the frequency of the driving signal is controlled by the first controller so that the resultant detected output becomes zero. Similarly, the amplitude of the driving signal is finely modulated by the oscillation frequency f.sub.1 of the second oscillator. The output of the detector is synchronously detected at the frequency f.sub.1 and the amplitude of the driving signal is controlled by the second controller so that the resultant detected output becomes zero. The frequency f.sub.0 of the first oscillator is different from that f.sub.1 of the second oscillator. Thus, the transmittivity can be maximized and stable filter operation can be realized. The apparatus may further include another variable high-frequency oscillator or a variable low-frequency oscillator which supplies to the acousto-optic filter two or more high-frequency signals for varying transmission bandwidth of the acousto-optic filter.
摘要翻译： 用于控制声光滤波器的装置包括高频振荡器，光束强度检测器，第一和第二振荡器以及第一和第二控制器。 高频振荡器驱动声光滤波器，驱动信号的频率由第一振荡器的振荡频率f0微调。 检测器检测声光滤波器的输出信号光束强度。 在频率f0同步地检测检测器的输出，并且由第一控制器控制驱动信号的频率，使得检测到的输出变为零。 类似地，驱动信号的振幅被第二振荡器的振荡频率f1精细地调制。 在频率f1处同步检测检测器的输出，并且由第二控制器控制驱动信号的振幅，使得检测到的输出变为零。 第一振荡器的频率f0与第二振荡器的f1不同。 因此，可以使透射率最大化并且可以实现稳定的滤波器操作。 该装置还可以包括另一个可变高频振荡器或可变低频振荡器，其向声光滤波器提供用于改变声光滤波器的传输带宽的两个或更多个高频信号。
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4.发明授权公开(公告)号：US09272349B2
公开(公告)日：2016-03-01
申请号：US13574521
申请日：2010-01-22
摘要： A numerical control device for a wire electric discharge machining apparatus generates a wire-breakage sign signal, outputs a machining-condition re-setting instruction and wire-breakage threshold re-setting instruction from the wire-breakage sign signal and wire-breakage threshold, sets the wire-breakage threshold according to the wire-breakage threshold re-setting instruction and a wire-breakage signal, calculates a machining energy from a discharge pulse count, measures a machining speed from position information, calculates a board thickness of the workpiece from the machining energy and machining speed, outputs, according to a predetermined algorithm, a machining-condition switching instruction from the board thickness, the machining-condition re-setting instruction, and the wire-breakage signal, sends an oscillation instruction to a oscillator and sends a shaft feed instruction to a servo amplifier so that the machining condition is set to one determined by the machining-condition switching instruction, and stores the machining condition and wire-breakage threshold that correspond to each board thickness.
摘要翻译： 一种电线放电加工装置的数控装置生成断线信号，从断线符号信号和断线阈值输出加工条件重新设定指令和断线阈值重新设定指令， 根据断线阈值重新设置指令和断线信号设置断线阈值，从放电脉冲计数中计算加工能量，从位置信息测量加工速度，计算工件的板厚度 加工能量和加工速度，根据预定算法，从板厚度，加工条件重新设定指令和断线信号输出加工条件切换指令，向振荡器发送振荡指令， 向伺服放大器发送轴进给指令，使加工条件设定为由加工条件确定的加工条件 n切换指令，并存储对应于每个板厚度的加工条件和断线阈值。
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公开(公告)号：US5394418A
公开(公告)日：1995-02-28
申请号：US147643
申请日：1993-11-04
申请人： Takahiro Shiozawa
发明人： Takahiro Shiozawa
IPC分类号： H01S3/10 , H01S5/042 , H01S5/0687 , H01S3/00
CPC分类号： H01S5/0687
摘要： The output light of a variable-wavelength light source 101 is brought to incidence on an optical resonator 103 having a periodic transmitting characteristic, and the transmitted light is detected by an optical intensity detector 105 and, having the difference from a reference level as the error signal, fed back by an operational amplifier 106 to the variable-wavelength light source 101. Therefore the output light frequency of the variable-wavelength light source 101 is stabilized at the shoulder of the peak of the transmitting characteristic (the point where the transmittance varies) of the optical resonator 103. Wavelength switching is accomplished by selecting one out of two variable current sources built into a wavelength control circuit 108. This variable current source switching forcibly shifts the stabilization point to the shoulder of the peak of another transmittance of the optical resonator 103. Upon supply of a wavelength designation signal 100-2 from outside, the output current value of the variable current source which is at present in a stand-by state is set at a value corresponding to the designated wavelength.
摘要翻译： 可变波长光源101的输出光被引入到具有周期性传输特性的光学谐振器103上，并且透射光被光学强度检测器105检测，并且与参考电平的差异作为误差 信号，由运算放大器106反馈到可变波长光源101.因此，可变波长光源101的输出光频率稳定在透射特性的峰值的肩峰（透射率变化的点 ）。通过选择内置于波长控制电路108中的两个可变电流源中的一个来实现波长切换。该可变电流源切换将稳定点强制地移动到光学器件的另一透射率的峰值的肩部 当从外部提供波长指定信号100-2时，输出曲线 目前处于待机状态的可变电流源的ent值被设定为与指定波长对应的值。
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公开(公告)号：US07269225B2
公开(公告)日：2007-09-11
申请号：US10629596
申请日：2003-07-30
IPC分类号： H04K1/10
CPC分类号： H04N21/4305 , H04J3/0632 , H04N21/23602 , H04N21/242 , H04N21/4342
摘要： A serial digital signal transmission apparatus can transmit HDTV digital serial signals with little jitter while utilizing the SRTS method. In the apparatus, parallel clocks are counted by an N counter to be supplied to the latch circuit, which latches the output count of a p-bit counter, RTSs are supplied from the latch circuit, as the result of comparison gated by a gate circuit is supplied to a PLL circuit and multiplied by N, parallel clocks of 74.25 MHz or 74.25/1.001 MHz, which are inputs to the N counter are regenerated (N is 8, 15 or 16), and transmitted data undergo parallel-to-serial conversion by a PS converter with these parallel clocks.
摘要翻译： 串行数字信号传输装置可以在利用SRTS方法的情况下传输具有很小抖动的HDTV数字串行信号。 在该装置中，由N个计数器对并行时钟进行计数，以提供给锁存电路，该锁存电路锁存p位计数器的输出计数，作为由门电路门控的比较结果，从锁存电路提供RTS 被提供给PLL电路并乘以N，74.25MHz或74.25 / 1.001MHz的并行时钟，N个计数器的输入被再生（N为8,15或16），并且发送的数据经过并行到串行 由这些并行时钟的PS转换器进行转换。
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公开(公告)号：US4768847A
公开(公告)日：1988-09-06
申请号：US633713
申请日：1984-07-23
申请人： Hideto Iwaoka , Takahiro Shiozawa
发明人： Hideto Iwaoka , Takahiro Shiozawa
CPC分类号： G02B26/106
摘要： An optical scanning device comprising a transmission or reflection hologram disk, wherein recording beams, such as an object and a reference beam which are used in preparing holograms, and a reconstructing beam which is used in reconstructing or scanning, are spherical waves having different wavelengths; and wherein the sources of recording beams and reconstructing beams are located at different positions for enabling the beams to fall obliquely on the hologram disk to cause a reconstructed image on a focusing or scanning plane to be subjected to linear aberration free scanning. The incident angle of the reconstructing beam on the hologram disk meets the Bragg condition for high diffraction efficiency.
摘要翻译： 一种包括透射或反射全息光盘的光学扫描装置，其中记录用于制备全息图的物体和参考光束的光束以及用于重建或扫描的重建光束是具有不同波长的球面波; 并且其中记录光束和重建光束的源位于不同的位置，以使得光束能够倾斜地落在全息图盘上，以使聚焦或扫描平面上的重建图像经历无线像差扫描。 重建光束在全息图盘上的入射角满足布拉格条件，以获得高衍射效率。
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公开(公告)号：US09168603B2
公开(公告)日：2015-10-27
申请号：US13382425
申请日：2009-07-07
申请人： Yasuo Onodera , Takahiro Shiozawa , Tatsushi Sato
发明人： Yasuo Onodera , Takahiro Shiozawa , Tatsushi Sato
摘要： A wire electric discharge machining apparatus that performs an electric discharge machining by applying a pulse voltage between a wire electrode (1) and a workpiece (2), the wire electric discharge machining apparatus including, a machining speed detection unit (14) that detects relative machining speed of the workpiece (2) and the wire electrode (1); a machining energy calculation unit (13) that calculates machining energy of a discharge pulse; a board thickness calculation unit (12) that calculates a board thickness of the workpiece (4) based on the machining speed detected by the machining speed detection unit (14) and the machining energy calculated by the machining energy calculation unit (13); a stationary state determination unit (16) that determines whether the machining is in a stationary state from a machining state during the machining, after the machining condition is switched in accordance with a board thickness of the workpiece (4) calculated by the board thickness calculation unit (12); and a machining condition switching unit (11) that switches the machining condition to a machining condition corresponding to a board thickness calculated by the board thickness calculation unit (12) when the stationary state determination unit (16) determines that the machining is in the stationary state and does not switch the machining condition to the machining condition corresponding to a calculated board thickness when the stationary state determination unit determines that the machining is not in the stationary state.
摘要翻译： 一种线放电加工装置，其通过在线电极（1）和工件（2）之间施加脉冲电压进行放电加工，所述线放电加工装置包括：加速度检测部（14），其检测相对 工件（2）和线电极（1）的加工速度; 计算放电脉冲的加工能的加工能量计算单元（13）; 基于由所述加工速度检测部（14）检测出的加工速度和由所述加工能量计算部（13）计算的加工能量来计算所述工件（4）的板厚的板厚计算部（12）。 固定状态判定单元（16），其根据由所述板厚计算得到的所述工件（4）的板厚度来切换加工条件之后，确定所述加工是否处于来自加工过程中的加工状态的静止状态 单位（12）; 以及加工条件切换部（11），其在所述静止状态判定部（16）判定为所述静止状态时，将所述加工条件切换为与所述板厚计算部（12）计算出的板厚对应的加工条件 状态，并且当静止状态确定单元确定加工不处于静止状态时，不将加工条件切换到对应于计算板厚度的加工条件。
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9.发明申请公开(公告)号：US20130024020A1
公开(公告)日：2013-01-24
申请号：US13574521
申请日：2010-01-22
IPC分类号： G05B19/18
摘要： In order to obtain wire-breakage thresholds and machining conditions for respective board thicknesses in a trial machining, a numerical control device for a wire electric discharge machining apparatus according to the present invention includes a wire-breakage-sign-signal generation means that generates a wire-breakage sign signal from machining state quantities, a wire-breakage sign detection means that outputs a machining-condition re-setting instruction and a wire-breakage threshold re-setting instruction from the wire-breakage sign signal and a wire-breakage threshold, a wire-breakage threshold setting means that sets the wire-breakage threshold according to the wire-breakage threshold re-setting instruction and a wire-breakage signal, a machining energy calculation means that calculates a machining energy from a discharge pulse count, a machining speed measurement means that measures a machining speed from position information, a board thickness calculation means that calculates a board thickness of the workpiece from the machining energy and the machining speed, a machining-condition switching means that outputs, according to a predetermined algorithm, a machining-condition switching instruction from the board thickness, the machining-condition re-setting instruction, and the wire-breakage signal, a control means that sends an oscillation instruction to a oscillator and sends a shaft feed instruction to a servo amplifier so that the machining condition is set to one determined by the machining-condition switching instruction, and a machining-condition storage means and a wire-breakage threshold storage means that store the machining condition and the wire-breakage threshold that correspond to each board thickness.
摘要翻译： 为了在试验加工中获得各板厚度的断线阈值和加工条件，本发明的电线放电加工装置用数控装置包括：断线符号信号生成装置， 来自加工状态量的断线符号信号;断线符号检测装置，其从断线符号信号和断线阈值输出加工条件重新设定指令和断线阈值重新设定指令 断线阈值设定装置，根据断线阈值重新设定指示和断线信号来设定断线阈值，根据放电脉冲数计算加工能量的加工能量计算单元， 加工速度测量意味着从位置信息测量加工速度，计算a的板厚度计算装置 根据加工能量和加工速度的工件的板厚度;加工条件切换装置，根据预定的算法，从板厚度，加工条件重新设定指令和 断线信号，向振荡器发送振荡指令并向伺服放大器发送轴馈送指令的控制装置，使得加工条件被设定为由加工条件切换指令确定的加工条件，加工条件 存储装置和断线阈值存储装置，其存储对应于每个板厚度的加工条件和断线阈值。
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公开(公告)号：US20120103943A1
公开(公告)日：2012-05-03
申请号：US13382425
申请日：2009-07-07
申请人： Yasuo Onodera , Takahiro Shiozawa , Tatsushi Sato
发明人： Yasuo Onodera , Takahiro Shiozawa , Tatsushi Sato
IPC分类号： B23H1/02
摘要： A wire electric discharge machining apparatus that performs an electric discharge machining by applying a pulse voltage between a wire electrode (1) and a workpiece (2), the wire electric discharge machining apparatus including, a machining speed detection unit (14) that detects relative machining speed of the workpiece (2) and the wire electrode (1); a machining energy calculation unit (13) that calculates machining energy of a discharge pulse; a board thickness calculation unit (12) that calculates a board thickness of the workpiece (4) based on the machining speed detected by the machining speed detection unit (14) and the machining energy calculated by the machining energy calculation unit (13); a stationary state determination unit (16) that determines whether the machining is in a stationary state from a machining state during the machining, after the machining condition is switched in accordance with a board thickness of the workpiece (4) calculated by the board thickness calculation unit (12); and a machining condition switching unit (11) that switches the machining condition to a machining condition corresponding to a board thickness calculated by the board thickness calculation unit (12) when the stationary state determination unit (16) determines that the machining is in the stationary state and does not switch the machining condition to the machining condition corresponding to a calculated board thickness when the stationary state determination unit determines that the machining is not in the stationary state.
摘要翻译： 一种线放电加工装置，其通过在线电极（1）和工件（2）之间施加脉冲电压进行放电加工，所述线放电加工装置包括：加速度检测部（14），其检测相对 工件（2）和线电极（1）的加工速度; 计算放电脉冲的加工能的加工能量计算单元（13）; 基于由所述加工速度检测部（14）检测出的加工速度和由所述加工能量计算部（13）计算的加工能量来计算所述工件（4）的板厚的板厚计算部（12）。 固定状态判定单元（16），其根据由所述板厚计算得到的所述工件（4）的板厚度来切换加工条件之后，确定所述加工是否处于来自加工过程中的加工状态的静止状态 单位（12）; 以及加工条件切换部（11），其在所述静止状态判定部（16）判定为所述静止状态时，将所述加工条件切换为与所述板厚计算部（12）计算出的板厚对应的加工条件 状态，并且当静止状态确定单元确定加工不处于静止状态时，不将加工条件切换到对应于计算板厚度的加工条件。
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